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50 Pence - Elizabeth II 5th portrait, Insulin

Issuer Royal Mint
Year 2021
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Composition Copper-nickel
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Obverse script Latin
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Reverse description The reverse presents an artistic interpretation of the molecular structure of insulin, rendered as an intricate network of interconnected spheres and bonds representing the protein's complex three-dimensional conformation. The molecular formula C257 H383 N65 O77 S6 is inscribed within the design, accompanied by the word INSULIN prominently displayed. The designer's initials IDLT appear as part of the composition, attributing the work to Iris De La Torre. The overall design commemorates the centenary of the discovery of insulin, balancing scientific precision with aesthetic elegance.
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Reverse lettering insulin C257 H383 N65 O77 S6 IDLT
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